Hey Team,
Overflow Row action has a tooltip that is not controllable and is UI noise most of the time.
We'll follow up when this is fixed!
To add here, now that buttons can be added to "Overflow" it would be nice to get ability to hide them depending on currentRow as having "Activate" and "Deactivate" both visible in overflow is not the best UI.
Additionally "Always show" row actions would be a good add as a lot of users do not like the feature as it's not clearly visible you can perform actions until you hover a row 
Agreed with both points!